Higher
16th April 1991
- 1Spheres and Cones3 marks
A cone has base radius 8 cm and vertical height 12 cm. Work out its volume, leaving your answer in terms of pi.
- 2Probability Trees3 marks
A bag holds 5 red and 3 blue counters. Two are taken without replacement. Work out the probability both are red.
- 3Capture Recapture3 marks
10 newts are marked and released. Later 48 are caught, of which 6 are marked. Estimate the population.
- 4Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.333... as a fraction in its simplest form.
- 5Inequalities on Graphs2 marks
A region is defined by y <= -2x + 2. Should the boundary line be solid or dashed, and why?
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Any date always gives the same five questions, so a sheet can be set again or shared. All of April 1991, including the monthly compilation PDF.